Reducible hyperbranched poly

Fig. 10 Reducible hyperbranched poly(amido amine)s (RHB), obtained by copolymerization of A,A-dimethylaminodipropylene-triamine (DMDPTA) and two bisacrylamide monomers NJf1-hexamethylene bisacrylamide (HMBA) or IVyV -cystamine bisacrylamide (CBA). Adapted with permission from [118] Copyright 2009 ACS...

Scheme 4 Synthesis of hyperbranched poly(amino ester), (a) Bulk polymerization under reducrf pressure at 140°C (b) (1) bulk polymerization under reduced pressure at 140 . . j -goi...

As compatibilizers, dendritic poly(ester) resins are useful. This covers both dendrimers and hyperbranched polymers (51). Compatibilizers are needed, because conventional poly(arylene ether)/PA blends exhibit inadequate flow properties at the processing temperatures that are needed to minimize the thermal degradation of the resins. However, increasing the processing temperature beyond these temperatures in order to reduce viscosity of the blends results in brittle parts and surface imperfections in the final part. 

---